Merge 118261 - [chromium] Turn ENABLE(OVERFLOW_SCROLLING) off for Chromium port

Merge 118261 - [chromium] Turn ENABLE(OVERFLOW_SCROLLING) off for Chromium port
https://bugs.webkit.org/show_bug.cgi?id=87177

Reviewed by Eric Seidel.

Source/WebKit/chromium:

Removes ENABLE(OVERFLOW_SCROLLING) from the set of enables set by Chromium. This guards a new non-standard
CSS property, -webkit-overflow-scrolling, that was introduced by iOS5 intended for mobile browsers. This
property is very partially implemented in Chromium but the way it's implemented does cause new stacking contexts
to be created that otherwise would not be, breaking "desktop" pages.

This turns the feature off until we can figure out how to deal with the compatibility issues.

* features.gypi:

LayoutTests:

Mark test depending on ENABLE(OVERFLOW_SCROLLING) as an expected failure since the define is off.

* platform/chromium/test_expectations.txt:

TBR=jamesr@google.com
BUG=124559
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=118844